From 796aa20a11b4060e07b0864081e6977eb66b64bd Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Mon, 26 Sep 2022 14:19:21 -0400
Subject: Doc: further adjust notes about pg_upgrade_output.d.

I'd misunderstood how it worked in 5f1048881.

Discussion: https://postgr.es/m/20220925215009.GC21938@telsasoft.com
---
 doc/src/sgml/ref/pgupgrade.sgml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index 405999f6ad3..8f7a3025c36 100644
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -773,8 +773,10 @@ psql --username=postgres --file=script.sql postgres
    with a timestamp formatted as per ISO 8601
    (<literal>%Y%m%dT%H%M%S</literal>), where all its generated files are
    stored.
-   <filename>pg_upgrade_output.d</filename> and all its contained files may be
-   removed once the upgrade is successfully completed.
+   <filename>pg_upgrade_output.d</filename> and its contained files will be
+   removed automatically if <application>pg_upgrade</application> completes
+   successfully; but in the event of trouble, the files there may provide
+   useful debugging information.
   </para>
 
   <para>
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